One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,13,15)(11,16,12,14)(17,18,21,25)(19,27,30,23)(20,24,33,40)(22,26,35,42)(28,45,46,37)(29,38,31,43)(32,48,47,39)(34,41,36,44)(9,10)(11,14)(12,16)(13,15)(17,19)(18,23)(20,32)(21,30)(22,29)(24,39)(25,27)(26,43)(28,34)(31,35)(33,47)(36,46)(37,41)(38,42)(40,48)(44,45) involution — undirected(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,20)(18,24)(19,28)(21,33)(22,36)(23,37)(25,40)(26,44)(27,45)(29,32)(30,46)(31,47)(34,35)(38,48)(39,43)(41,42)(9,11,13,12)(10,14,15,16)(18,25)(20,33)(23,27)(26,42)(28,46)(32,47)(34,36)(38,43)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,14,15,16)(18,25)(19,29)(22,35)(23,38)(24,40)(27,43)(28,32)(30,31)(34,36)(37,48)(39,45)(46,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.